Process of shaping metals



July 27, 1937. E. LEUSSLERY 2,088,525 A PROCESS OF SHAPING, METALS Opigtnal Filed May 13, 1935 I v FLZg Z.

Patented July. 27 1937 UNITED STATES PATENT OFFICE PROCESS OF SHAPING METALS Emil Leussler, Nuremberg, Germany Original application May 13, 1935, Serial No. 21,255. Divided and this application April 20, 1936, Serial No. 75,485. In Germany March 15,

2 Claims.

This invention relates to a process of shaping metals and has particular reference to a process of deforming relatively thin metals by means of dies.

The present invention is a division of my application Serial No. 21,255 filed May 13, 1935 for Cartridge shells, and allowed February 24, 1936.

Heretofore, thin metals have been deformed by dies in the usual and well known manner by plac- 20 tridges wherein the side walls and head of the cartridge are made from a single piece of metal. In the drawing accompanying and forming a part of this application,

Fig. 1 is a vertical sectional view of a cartridge 25 shell produced in accordance with my invention and illustrating the initial step of the process;

Fig. 2 is a similar view showing the head of the cartridgefurther deformed for the reception of the priming cap; and

Figs. 3, 4 .and 5 are similar views of a slightly modified form of cartridge shell.

In carrying out my process, a relatively thin blank of a suitable metal such as aluminium is placed between suitable male and female dies,

and then the dies are reciprocated with a speed suitably shaped dies to form the primer cap aper-' sufilcient to create enough heat to fuse the metal and permit it to flow between the dies and assume the shape defined thereby as illustrated in Figs.

1 and 3.

In Fig., 1, the shell is illustrated as having a side wall I anda reinforced head portion 2 integral therewith.. .The line of meeting of the side wall-l and the head portion 2 defines an annular shoulder '3. This shoulder is adapted to support a disk, not shown, as commonly used to 'divide the powder chamber from the shot chamher. The shell produced in Fig. 1 is .then subjectcd to a furtherpressing operation in other ture I.

The relatively thin metal blank at room temperature from which the cartridge is formed, is'

fused by the heat generated by the sudden appliing the sheet metal blank between male and fecation of high pressure by the dies, and this fused metal flows between the dies to define the desired shape. Practically as suddenly as the metal fuses, it also solidifies to the desired shape and hence it can be ejected from the dies without delay. A cartridge shell thus formed is free from internal stresses and strains as compared to that produced by the ordinary drawing operation and hence provides a more satisfactory finished product.

In Figs. 3, 4 and 5, I. have illustrated a slightly modified form of cartridge shell. In these figures, the initial step shows the shell having a thin side wall 5 and a relatively short reinforced head'portion 6 which is devoid of the usual head rim. The

product illustrated in Fig. 3 isformed as described in connection with Fig. 1. After the initial step, the shell shown in Fig. 3 is subjected to a further pressing operation in otherdies to form the head rim I and the primer cap aperture'8. In this 'form of cartridge, the annular supporting shoulder for the partition disk, not shown, is formed by deflecting the metal of the .side walls inwardly as indicated at 9.

It will be obvious to those skilled in the art that the above two forms of shells illustrating my invention are purely illustrative of articles which can be made by my process and that various shapes ofthis or other, articles can be readily made in the same manner. It is also obvious that. while I have disclosed aluminium as one metal suitablefor use in the process, other similar fusible metals such as brass, might be substituted, the selection of vthe metal, depending upon'the nature of the article and the heat developed by reason of the shape of the dies and the sudden application of high pressure in forming the article.

What I claim is: a 3

1. The process of shaping articles from aluminum by means of reciprocating dies which consists in reciprocating the dies with such rapidity that the heat developed by friction causes the metal to fuse and flow between thedies.

2. The process of forming a cartridge shell with reciprocating dies from a single piece of metal which consists in striking the cold metal with such rapidity and force andvin one single operation that the heat developed by friction causes the metal. to fuse and flow between the forming dies to form a cartridge shell having a reinforced head portion and a relatively thin side wall extending from said head portion. 

